Govt Exams Mock Test FREE | Online Quiz Competition

Q1. What is the average value of the output voltage \(V_{av}\) of resistive load chopper when the supply voltage is \(V\) and \(T_{on}\) & \(T_{off}\) are the periods of conduction and blocking of thyristor?

\(V_{av} = \frac{V\:T_{off}}{T_{on} +T_{off}}\)

\(V_{av} = \frac{V\:T_{on}}{T_{on} +T_{off}}\)

\(V_{av} = \frac{V\:T_{on}}{T_{off}}\)

\(V_{av} = \frac{V\:T_{off}}{T_{on} }\)

Q2. In buck converter, the critical capacitance value of the capacitor 'C' connected across the load is

directly proportional to the switching frequency

inversely proportional to the square of the switching frequency

inversely proportional to the switching frequency

directly proportional to the square of the switching frequency

Q3. A single phase ac controller feeds pure inductive load. Its control angle range

\(0 ≤ \alpha < \pi \)

\(0 ≤ \alpha < \pi/2 \)

\(\pi/2 ≤ \alpha < \pi \)

\(\pi ≤ \alpha <3 \pi/2 \)

Q4. A freewheeling diode is sometime connected in an inductive load circuit in a half wave rectifiers circuits___________.

To conduct during the negative half of the supply

To give better filtering and reduce ripple

To conduct so as to reduce the angle of conduction to \(\pi\)

To improve transformer utilization

Q5. In a constant V/f induction motor drive, the slip at the maximum torque

is directly proportional to the synchronous speed

remains constant with respect to the synchronous speed

has an inverse relation with the synchronous speed

has no relation with the synchronous speed

Q6. For 'n' on-cycles and 'm' off-cycle of single phase AC voltage controller, the input power factor is _______ .

\(\sqrt \frac{n}{n+m}\)

\(\sqrt \frac{m}{n}\)

\(\sqrt \frac{n}{m}\)

\(\sqrt {nm}\)

Q7. How much is the ripple frequency in a bridge rectifier with respect to the input frequency?

3 \(\times\) input frequency

4 \(\times\) input frequency

2 \(\times\) input frequency

Same as input frequency

Q8. A current transformer

should have its secondary open while the primary is carrying current

should never have its secondary open while the primary is carrying current

is never used with the secondary circuit closed through ammeters, wattmeters, current coils or relay coils

may keep the secondary circuit closed without any serious trouble

Q9. Which of the following transducer is classified as active transducer?

metallic strain guage

capacitivie micro phone

LVDT

piezo electric transducer

Q10. Identify the instrument that is used for D.C. only?

Electrostatic type

Repulsion type moving iron

Permanent-magnet type moving coil

Split phase induction type

Quiz

Year 2024

April
Week # 4 Quiz 2

Q1. What is the average value of the output voltage \(V_{av}\) of resistive load chopper when the supply voltage is \(V\) and \(T_{on}\) & \(T_{off}\) are the periods of conduction and blocking of thyristor?

Q2. In buck converter, the critical capacitance value of the capacitor 'C' connected across the load is

Q3. A single phase ac controller feeds pure inductive load. Its control angle range

Q4. A freewheeling diode is sometime connected in an inductive load circuit in a half wave rectifiers circuits___________.

Q5. In a constant V/f induction motor drive, the slip at the maximum torque

Q6. For 'n' on-cycles and 'm' off-cycle of single phase AC voltage controller, the input power factor is _______ .

Q7. How much is the ripple frequency in a bridge rectifier with respect to the input frequency?

Q8. A current transformer

Q9. Which of the following transducer is classified as active transducer?

Q10. Identify the instrument that is used for D.C. only?

Quiz

Year 2024

July Week # 1 Expire on 31 Jul 2024

July Week # 2 Expire on 07 Aug 2024

July Week # 3 Expire on 14 Aug 2024

July Week # 4 Expire on 21 Aug 2024

April Week # 4 Quiz 2

Q1. What is the average value of the output voltage \(V_{av}\) of resistive load chopper when the supply voltage is \(V\) and \(T_{on}\) & \(T_{off}\) are the periods of conduction and blocking of thyristor?

Q2. In buck converter, the critical capacitance value of the capacitor 'C' connected across the load is

Q3. A single phase ac controller feeds pure inductive load. Its control angle range

Q4. A freewheeling diode is sometime connected in an inductive load circuit in a half wave rectifiers circuits___________.

Q5. In a constant V/f induction motor drive, the slip at the maximum torque

Q6. For 'n' on-cycles and 'm' off-cycle of single phase AC voltage controller, the input power factor is _______ .

Q7. How much is the ripple frequency in a bridge rectifier with respect to the input frequency?

Q8. A current transformer

Q9. Which of the following transducer is classified as active transducer?

Q10. Identify the instrument that is used for D.C. only?

Record & Track Your Performance

April
Week # 4 Quiz 2